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  • Aabel, Lise, 1992, et al. (författare)
  • Distributed Massive MIMO via all-Digital Radio Over Fiber
  • 2020
  • Ingår i: Conference Record - Asilomar Conference on Signals, Systems and Computers. - 1058-6393.
  • Konferensbidrag (refereegranskat)abstract
    • A crucial challenge in the implementation of distributed massive multiple-input multiple-output (MIMO) architectures is to provide phase coherence while, at the same time, limit the complexity of the remote-radio heads (RRHs), which is important for cost-efficient scalability. To address this challenge, we present in this paper a phase-coherent distributed MIMO architecture, based on off-the-shelf, low-cost components. In the proposed architecture, up- and down-conversion are carried out at the central unit (CU). The RRHs are connected to the CU by means of optical fibers carrying oversampled radio-frequency (RF) 1-bit signals. In the downlink, the 1-bit signal is generated via sigma-delta modulation. At the RRH, the RF signal is recovered from the 1-bit signal through a bandpass filter and a power amplifier, and then fed to an antenna. In the uplink, the 1-bit signal is generated by a comparator whose inputs are the low-noise-amplified received RF signal and a suitably designed dither signal. The performance of the proposed architecture is evaluated with satisfactory results both via simulation and measurements from a testbed.
  • Aaboen, Lise, 1978 (författare)
  • Business Incubators as Networks - How and Why?
  • 2008
  • Ingår i: Proceedings of ECEI 2008 The 3rd European Conference on Entrepreneurship and Innovation. ; , s. 1-8
  • Konferensbidrag (refereegranskat)
  • Aaboen, Lise, 1978, et al. (författare)
  • Capturing processes in longitudinal multiple case studies
  • 2012
  • Ingår i: Industrial Marketing Management. - 0019-8501. ; 41:2, s. 235-246
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper discusses and suggests a methodological approach to capture processes in multiple case studies. While single case studies may address processes in an inductive or abductive manner, multiple case studies entail a stronger need for analytical frameworks and methodological tools developed ex ante in order to maintain focus on the same phenomena across cases and over time. This is, however, difficult to pursue in studies that focus on processes. The aim of the paper is to suggest an approach to longitudinal multiple case studies. We use an example of an on-going multiple case study aiming at capturing the processes of strategizing in terms of how the networking of start-up companies interplays with their ideas of future network positions. The paper concludes by suggesting the use of a combination of narratives and network drawings. Network drawings can be instrumental in capturing the past, the present and the future at different points in time for the individual cases. Based on these descriptions, change patterns and how these evolve can be analyzed and compared across cases and over time.
  • Aaboen, Lise, et al. (författare)
  • Designing and Assessing Learning in Venture Creation Programs - Winner of Best Practitioner Development Workshop Award
  • 2018
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • Workshop Summary In Venture Creation Programs the venture acts as a ‘learning vessel’, enabling what students need to learn - and more - given a greater or lesser extent of guidance. But how do we ensure that the students are engaging in ‘doing what they need to do’ in order to ‘learn what they need to learn’? In this workshop, participants will benchmark and crowdsource to identify and develop teaching tool prototypes for venture creation programs. Each ‘teaching tool’ consist of a learning objective, a combination of learning activities and an assessment suggestion. The workshop consists of two steps: the first is to capture learning activities from the entire group; then we divide into smaller groups where we develop them further into teaching tools. The teaching tools can later be used by the participants in their home university in order to package integrated venture activities so that the activities become aligned to the learning objectives.
  • Aaboen, Lise, 1978 (författare)
  • Explaining incubators using firm analogy
  • 2009
  • Ingår i: Technovation. - 0166-4972. ; 29:10, s. 657-670
  • Tidskriftsartikel (refereegranskat)abstract
    • Incubators are initiated to accelerate the development of new technology-based firms. Policy actors see them as a tool to initiate or revive innovativeness in regions and universities as a way to commercialize research results. However, even though the intended results of the incubator are good it is not known how the incubator should be managed and organized in order to achieve this end. When faced with a new type of organizations analogies can provide insights gathered from other contexts. To contribute to the further understanding of incubators this paper discuss the implications, in terms of highlighted dimensions and further clarifications needed when using the analogy of a firm. The paper uses empirical findings from six incubators. The discussion shows it is not clear who is the actual customer of the incubator. For example, can the policy actors that provide the funding to the incubator be seen as a customer paying for the service of regional revival and the NTBFs customers when their fees are not in relation to the services they are provided? In the discussion it is suggested that the incubator can have many customers with different value creation processes or no customers depending on the viewpoint taken.
  • Aaboen, Lise, 1978 (författare)
  • Incubators and incubation -Resources and activities in relation to different actors
  • 2008
  • Doktorsavhandling (övrigt vetenskapligt)abstract
    • ABSTRACTIncubators prepare new technology-based firms (NTBFs) for the obstacles ahead, they complement and develop the entrepreneurial ability of the firm founder, advise regarding financing, as well as providing structure and credibility to the firm. Incubators accelerate the development of the firms towards growth, create an entrepreneurial and innovative climate in the region, and contribute to the commercialization of research results from the university. There are many descriptions but still there remains the difficulty of understanding what an incubator is, and what it does. There is a great difference between incubators due to them having been formed in relation to different actors who have varying histories. Based on the appended papers the principal actors in relation to incubators are: the incubator, the NTBFs, the university, the policy actors and the financial actors. Moreover, the part played by the incubator differs depending on the roles in relation to the different actors, and they often have more than one role in relation to the same actor. Hence, the purpose of this thesis is to explore incubation in relation to different actors. The exploration includes five appended papers. Three of the papers focus on the role of the incubators when helping the NTBFs find and utilize resources. The three types of resources are knowledge, financing and relationships. The two remaining papers focus on the incubator as an organization with particular interest in value creation and efficiency. All five appended papers are written using the resource-based view. In the cover paper the findings in the appended papers are reflected upon using the industrial network approach in order to provide another perspective, focusing on relationships as opportunities leading to an understanding of incubators and incubation. In the cover paper principal actors, activities and resources are explored. The NTBFs are developed through the incubation with the help of resources contributed by the other actors. Additional to the development, the cover paper discussed other activities included in the incubation, i.e. mediation, innovation and acceleration. These activities enable actors to access and combine resources, within and across firm boundaries, that they would otherwise have difficulties combining at that point in time, as quickly or in that way. The relationships of the incubator enable mediation of contacts between actors who are otherwise reluctant to collaborate. Through these collaborations new resource combinations may be found. Resource combinations in already existing relationship can be found using experience from other relationships. In other words, the relationships of the incubator contribute to innovation among the actors. Furthermore, the relationships of the incubator contribute to the acceleration of the NTBFs’ development by being a trusted third party actor, and by contributing to the coordination of actors aiming at improving the innovative climate. Hence, relationships are a special kind of resource for the incubators. The importance of the relationships for the incubators implies that the critical issues might not be to pick NTBFs based on criteria for growth potential, but rather on the ability to form and develop relationships for themselves, as well as the NTBF, in order to develop the firm. Furthermore, arguments regarding the increasing homogeneity among Swedish incubators are based on the rather formalized relationships with the policy actors where incubators tend to play rather similar roles. The heterogeneity is likely to be perceived as larger from the perspective of relationships that are more context specific. Moreover, the relationships, activities and combination of resources cross-fertilize each other without a natural or manageable direction that cannot be controlled by one or a few of the actors involved. After the concluding discussion there is a retrospection of the development of the thesis and the empirical material, which is based on qualitative and quantitative data that has been gathered within the Swedish incubator program mainly during 1999, 2005 and 2006.
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